Alexey is a test developer with solid experience in automation of web-applications using Java, TestNG and Selenium. He is so much into QA that even after work he provides training courses for junior QA engineers.

Spring JPA Data + Hibernate + MySQL + Maven

Development of web-applications with the help of Spring MVC implies creation of several logical layers of architecture. One of the layers is a DAO (Repository) layer. It is responsible for communication with a database. If you developed the DAO layer at least once, you should know that it involves a lot of boilerplate code. A Spring Data take a part of the routine job related to the DAO on itself.

In the post I’m going to provide an example of application which will demonstrate Spring Data (JPA) in conjunction with Spring MVC, MySQL and Maven. Hibernate will be used as implementation of the JPA. As you probably know, I’m a real fan of java based configurations, so I will use this approach to configure the Spring Data. In the end of the tutorial you can find a link to the sample project on GitHub.

Preparation

In the article I want to concentrate on the Spring Data, so all stuff which is out topic I will omit. But in the start I want provide a bulk of links which can be helpful for you in context of this tutorial.

Pay your attention at @EnableJpaRepositories annotation. It enables usage of JPA repositories. The com.spr.repository package will be scaned to detect repositories. In the entityManagerFactory bean I determined that Hibernate will be used as JPA implementation.

Definitely it is the most simplest code snippet in the tutorial. But it requires the most high attention. The JpaRepository interface contains the basic operations which can be performed with any entity (CRUD operations). More information you can find on the official documentation page.

Summary

The Spring Data is very powerful weapon, it helps you develop an application more faster and avoid hundreds of boilerplate strings of code. Usage of Spring Data is the most convenient way to create a DAO layer in an application, so don’t ignore it in your projects.

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